Robert Patrick to guest on 'Chuck'

Actor Robert Patrick is to guest star on an upcoming episode of NBC's spy comedy Chuck.

The Terminator 2 star is slated to appear midway through the show's third season, reports Entertainment Weekly.

He will play Col Keller, a mysterious man with a connection to Adam Baldwin's Casey in the episode 'Chuck Versus the Tic Tac'.

The 51-year-old recently appeared on CBS series NCIS. He will next be seen in feature film Freedom for Joe.